Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e694d662ff86b0…

MALICIOUS

PDF

132.0 KB Created: 2021-07-17 20:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09d2d90f77da0db44e5cc344e2da8f10 SHA-1: 783fb84017639602ac5e9a5f4d8f2a45c5b0946c SHA-256: e4e694d662ff86b0ae974c23a9c5b8c9c1082c7411a90f78f138af89f3ede8cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to websites that appear to be compromised WordPress installations used for hosting malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://bonfiremadigan.com/uploads/fckeditor/file/dedabesegonewijul.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/m9u86qj1nlbr5288d93gishbn5/24458954694.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b84d7752e---devetikukoposolot.pdf
    • http://moyamoya.center/images/hand_uploaded/files/lepesevetoxo.pdf
    • http://daechienglishpark.com/ckfinder/userfiles/files/4476101287.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/a42191a95eef1ef3a710127e35603d55/sifigexajizoxutomofagukal.pdf
    • http://www.dereformasenalicante.com/archivos/files/buvilogimuvarefe.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/08c8a51fd10cdfc7175b517edd8b4314/pigibena.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/fc35694d9eac0e06336dcad5c2a52953/wemojuzozugamazuvubofinaf.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8c0ee79df---90645696805.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f8ef9a9f1---11535909471.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/80fd0f2e34da292524e45e62e7398821/wasigulidubovigal.pdf
    • http://muzeumostrowiec.pl/obrazy/file/lufukeginikesibupexirajos.pdf
    • https://chupwo.com/editor_upload/file/bakuganopopa.pdf
    • http://tortsurprise.ru/upload/redactor/files/levefiwa.pdf
    • http://yuanjen.com/ckfinder/userfiles/files/benejarogisazanotosidosa.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774cb903eac---1406908232.pdf
    • http://beastyenergy.com/userfiles/file/fanosegoguzutewagido.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d7caf31529f---tixiwopeseki.pdf
    • http://heureka-cz.eu/files/wadijo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=ts+eliot+notes+towards+the+definition+of+culture+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019b5d.bin
00e16d1aa88f931089db2f1c52e58ede4391cdb8230ff65d7f9f811fe4e5caa5
pdf-font-stream PDF embedded font (sfnt) at offset 0x19B5D 22436 bytes
font_01_sfnt_off0001d15a.bin
a71a16ec700db6163d820b8a8a3479cfd5e9dfa9e9b81120baceb36a92e4a141
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D15A 10864 bytes
font_02_sfnt_off0001ea7a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA7A 16792 bytes